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You are consulting for a polling organization. They want to know how many people they need...

You are consulting for a polling organization. They want to know how many people they need to sample, when predicting the results of the gubernatorial election.

  1. If there were 100 people polled, and the candidates each had 50% of the vote, what is the standard error of the poll?
  2. If there were 200 people polled?
  3. If there were 400 people polled?
  4. If one candidate were ahead with 60% of the vote, what is the standard error of the poll?
  5. They want the poll to be 95% accurate within plus or minus 3 percentage points. How many people do they need to sample?
Math   Statistics-And-Probability   
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